Regarding the "not having time to read the information" comments:

The Congress people have tremendously able, gifted and hard-working staff members who not only perform the due diligence and discovery work, but network with each other so that allied subject-matter experts can weigh in on the technical significance of subsections within each Bill's content. These professionals know what the Bills contain. The resulting voting decisions (and public positions) of Congress members are 'informed' by the staffers.   

It is innaccurate to claim that the due diligence is not performed by each party. However, at times it can be an effective public tactic to get before a microphone on the steps of some vaunted Hall and claim that you (or your party) were not given the time to read the content of a Bill (that, by the way, despite having insufficient knowledge thereof, you oppose). The claim is, however, complete and utter nonsense.